Wireless Resource Scheduling via Geographical Clustering
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Solution Overview
Problem
In wireless communication systems, interference occurs between D2D user equipment pairs and cellular user equipments when they share physical transmission resources, and between D2D user equipment pairs themselves, necessitating a solution to reduce interference while improving resource utilization efficiency.
Innovation Solution
An apparatus and method that schedules physical transmission resources for D2D user equipment pairs and cellular user equipments by grouping them into clusters based on geographical locations, determining whether they can multiplex the same resources, and allocating orthogonal or shared resources to minimize interference and enhance resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If D2D user equipment pairs and cellular user equipments share physical transmission resources, then resource utilization efficiency is improved, but interference occurs between D2D user equipment pairs and cellular user equipments
Solution Approach 1:
The patent segments user equipments into different clusters based on geographical locations. By dividing the network into multiple clusters, D2D user equipment pairs can share resources with cellular user equipments in different clusters without causing interference, as each cluster uses orthogonal resources. This segmentation enables resource reuse across clusters while maintaining isolation within clusters to prevent interference.
Solution Approach 2:
The patent introduces a spatial dimension by clustering user equipments based on geographical locations. Instead of treating all user equipments uniformly, the system creates multiple spatial groups (clusters) that can independently allocate resources. This dimensional approach allows the same physical transmission resources to be reused across different spatial clusters, improving resource utilization while preventing interference through spatial separation.
2Productivity
If D2D user equipment pairs use the same physical transmission resources, then resource utilization efficiency is improved, but interference occurs between D2D user equipment pairs
Solution Approach 1:
The patent segments D2D user equipment pairs into different clusters based on their geographical locations. Within each cluster, resources are allocated orthogonally to avoid interference. Across different clusters, the same physical transmission resources can be reused because the spatial separation ensures that D2D pairs in different clusters do not interfere with each other. This segmentation strategy enables efficient resource utilization while preventing interference.
3Productivity
If physical transmission resources are allocated uniformly without clustering, then system complexity is reduced, but resource utilization efficiency deteriorates due to inability to reuse resources across different user equipment groups
Solution Approach 1:
The patent performs preliminary clustering of user equipments based on geographical locations before resource allocation. By pre-organizing user equipments into clusters, the system establishes a structured framework that enables efficient resource reuse. This preliminary action simplifies the subsequent resource allocation process, as resources can be systematically reused across clusters without requiring complex real-time coordination, thus improving resource utilization while keeping system complexity manageable.
Data Source
AI summary
An apparatus and method for wireless communications, a base station, and a user equipment side apparatus in a communication system. The wireless communications apparatus includes: one or more scheduling units configured to, responsive to transmission demands of plural user equipments managed by the apparatus, judge, based on user equipment clusters to which the plural user equipments belongs, whether the plural user equipments can reuse same physical transmission resources or not, and schedule, based on a judgment result, corresponding physical transmission resources for the plural user equipments; and a signaling generating unit configured to generate, based on resource scheduling of one or more scheduling units, downlink control information containing resource scheduling information to apply same to the plural user equipments, the user equipments including D2D user equipment pairs and honeycomb user equipments, the plural user equipments being divided into at least one user equipment cluster in advance based on geographic positions.